Bookings at Trump Hotels have plummeted by more than half since The Donald launched his controversial presidential campaign.

While Trump's own popularity among his voters did not waver as he strode towards the Republican nomination, the hotel arm of his empire has taken a hit, according to data from travel firm Hipmunk.

Reservations at his hotel collection have fallen by 59 per cent year-on-year as their market share has crumbled.

Bookings at Trump Hotels have plummeted by more than half since The Donald launched his controversial presidential campaign, with his hotel in SoHo (right), New York, seeing a decline in reservations of 74 per cent

There was a similar fall in bookings at the gold-gilded Trump International Hotel Las Vegas (pictured), where there were 71 per cent less bookings

In Q1 this year, Trump Hotels have just 0.7 per cent of the market share of bookings made through Hipmunk, as opposed to 1.7 per cent in Q1 of 2015

In the first three months of 2015 - long before Trump declared he was running for the White House - Trump Hotels had a market share of 1.7 per cent of bookings made in major cities where they are located.

In Q1 this year, Trump Hotels have just 0.7 per cent of the market share of bookings made through Hipmunk.

One of the hotels to escape unscathed is Trump International Hotel Waikiki Beach Walk in Honolulu, Hawaii, where bookings have increased by four per cent.

It is possible that Trump's bombastic campaigning - which has seen him call for a ban on Muslim immigrants and insist he is going to make Mexico pay to build a wall on the border - has taken a toll on the popularity of his hotel chain.

The data on the five-star boutique hotel collection's bookings has come solely from Hipmunk, which is mainly used by younger people who may not agree with Trump's stance on several political issues.

The figures do not reflect how well the company is faring through other travel providers.